I mentioned the Amiga mouse from the Essen show in an earlier post, now there is an easy way for you to order it yourself without going to a1k.org and Google translate (if you can not speak German language).
Just go to this thread on amigaworld.net and follow instructions, price is around 15 euro which I think is a great price for a neat Amiga USB optical mouse. Keep in mind this is a mouse for a next-gen system and not for 68k systems although I guess it will work fine with Deneb and other USB solutions if 68k floats in your boat.
Oh, and it seems to be filled with water and has a boing ball in the transparant part of the mouse, how neat!